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Item#: N82E16817207028

XFX P1-850B-BEFX 850W ATX12V 2.2 & ESP12V 2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply

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  • ATX12V 2.2 & ESP12V 2.91
  • Full Modular
  • 80 PLUS GOLD Certified
  • 100 - 240 V 50/60 Hz
  • +3.3V@25A, +5V@25A, +12V@70A, -12V@0.8A, +5VSB@3A

  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

XFX 850W Full Modular Power Supply

Designed for serious gamers and DIY professionals, the XFX P1-850B-BEFX PSU delivers clean and stable power required for demanding gaming rigs and workstations. A single, strong 12V rail flexibly routes maximum available power to all parts, enabling you to maximize power usage and make your set up easy. It's also been awarded the 80Plus Gold certification for its high power efficiency, and is designed for NVIDIA SLI and AMD Crossfire multi-GPU systems - making it a perfect solution for hardcore gamers. Modular design reduces cable clutter, and the large fan delivers silent cooling so your computer and PSU can operate at peak performance.


XFX 850W Power Supply

SolidLink™ Power Supplies
Less Wires. Less Heat.

XFX 850W Power Supply

SolidLink Fully Modular PSUs don't have as many primary wires - instead we use pin lag that directly connects to the connector's daughter board.

XFX 850W Power Supply

Traditional fully modular PSUs tend to have a bundle of cables which are connected to the connector daughter board which generate heat causing Wattage loss.

SolidLink™ Technology Difference

  • Drastically reduces the lost Wattage
  • Draws less wall power which saves you money
  • Replaces traditional wired connections with direct pin-to-port connections
  • Reduces heat generated by wires
  • Reduces lost Wattage giving you clean, consistent high quality voltage

Hybrid Fan Control
Quieter & More Power Efficient

XFX 850W Power Supply

Hybrid mode when activated, allows your fan to stay off when your computer is idle but turns on automatically when the PSU needs it.

  • Operates Silently until it reaches 20% load or 25°C
  • Switches to Quiet Mode (only 16dBA)
  • Reaching 50% load which Cooling Mode to cool the PSU appropriately

80 Plus Gold Certification
Super High Efficiency

XFX 850W Power Supply

Efficient Power Use

  • 80 Plus Gold certified means that this XFX PSU has up to 90% power efficiency (only 10% of the power drawn from the outlet is lost).
  • Compare that to non-certified PSUs, which lose at least 20% of power drawn.
  • With XFX PSUs, you get every Watt you pay for.

The XFX Difference
Other Great Features

  • Full Modular Design
  • Up to Eight (8) PCI-E 6 + 2-Pin Connectors
  • True Wattage Guarantee
  • Tight DC Voltage regulation with minimal AC ripple
  • Extreme Heat Tested Capacitors

EasyRail™ Technology
One Rail, One Setup

XFX 850W Power Supply

Single Rail Design

  • Unique, continuous EasyRail™ technology enables you to maximize available power and make set-up easy.
  • Stack numerous power-hungry components without fear of crashing.
  • It's also a perfect solution for hardcore gamers.

General Specs

  • 850W Max. Power Output
  • 47Hz - 63Hz Frequency
  • Single Rail
  • Auto Switching 115V and 230V
  • Includes AC Power Cord


XFX Power Supply

Learn more about the XFX P1-850B-BEFX

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years
  • Read full details
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by's Standard Return Policy.
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